System of control.



PATENTED DEC. 24, 1907.

11- L. BEACH. SYSTEM OF CONTROL. I APPLICATION FILED HA3. s, 1906.

WITNESS ES ATTORNEY I of ener UNITED STATES PATENT-OFFICE.

" HOWARD BEACH, OF WILKINSBURG, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A,

SYSTEM on 'oorrrnon.

To all whom it may concern: Be it known that I, HOWARD L.-BEACH, a citizen of the United States, and a resident of 'VVilkinsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and .usefullmprovement in Systems of Control, of which the following is a specification.

. My invention relates to systems ofcontrol for electrical translating devices and-particu-j 'l&I'l 7 to systems for the control of motors J- 'that are adapted to be operated by either direct or-alternating current.

One'object of my invention is to provide a novel and improved means whereby the cir- -1 cuits'of the system may be arranged autoiriatically in accordance with the character.

v switches 38, 39, 40 and ilperform the-same L er object of my invention 18 to infunctions with reference to'the'other pair-cf 2;.- sure 0 ening'of thelmotor circuit-except f when t e system is supplied with the one'or gy that is supplied thereto. 4 'Anot the other character of energy.

A further object of my invention is to provide "means whereby the devices for arranging the circuits of the system in accordance with the character of energy that is supplied I thereto maynbe'rendered .ino erative when .the motor-circuitsare establis ed for either 'forward or 'reverse o'peration .30 v1f-drawingillustrates,-diagrammatically, a sys- --tcm" embodying my invention. v SZAlternating current 3 eleetric motors,'having-armatures 1, 2, 3 and T-he single figure of theflaccompanying may be supplied to 4 mm are arranged in series-connected pairs, -and=l'1avin'gfield magnet windings 5 6, 7 i and '8 that are similarly arranged, :from transformers-Wand 10 whereby the voltages ap-,- pliedfthere'to maybe-varied,the transformers" eing arranged in arallel circuit between a ground 'd tra'ck'rai 11 and atlfolley collector 12. that is-adapted to engage a dlstributing conductor 13:and is especially constructed for the collection of high-voltage currents. The-track rail 11 and the'disti ibuting or trol ley conductor 13 may be supplied with alternating current from any suitable source .such 'as'thatshown at 14.

The system may be sup current,=f suc'h as that shown at 17,

Specification of Letters Patent. Application filed March 8. 1966. Serial No. 30;;097.

voltages applied to themoto'rs from the trans formers 9 and 10, when operating by. alter- .fiowthrough the field magnet windingsfiand lied with direct current =from a current col ector or shoe 15' ;,f-that*engagez a third rail- 16 to which and to '."-'the "track rail 11- a suitable source of direct CORPORATION or PENNSYLVANIA.

Patented p g-.24, 1907.

connected,-res' istances 18 and lg-beingincluded in the motor circuits under' certain conditions 'of operation. The circuits of the' motors may be established, and the circuit relations thereof governed, by -means of switches 20, 21, 22,23, 24 and 25,-.andithe amounts of the resistances 13 and 19 thatare1"60 included-in the circuits may be'governedi by. means OfJsWitche'sJ-ZG, 27, 28Iand L29.;:;';The-

nating current, may be governed b 'means of switches 30, 31 32 and 33. The irection of rotation of the first air of motors may be changed by changing the direction of-current 6 by means of switches 34, 35, 36 and'.37 and motors.

The switches 20 to '4l",' in clusive,.mayibe rovided, respectively, 'witli inagnet-iiwindings 42 to 63, inclusive,;lfor operating'theswitches directly, or other meanasuch. as electro-pneumatic devices, for operatingithe switches-ma be employed. The circuits-of, magnet win ings-56 to 63, inclusive,-aregov $0 erned bymeans of a direction-controlling or master reversing switch .64 and the -.circu its. of the remaininglmagnet windings. are governed by means of:a change-over switch-.65 and amaster'switchfifi. 185 The change-over switch 5 isJadaptedito,, occ u(py positions indicated by broken lines-. A and D 'C =and thereby serves to"arq range the circuits of the controlling :mag I net windings for the individuallyio erated'.-9o switchesso that the-motors mayo e=con' nected-f'in series-parallel relation i between suitable points in the transformer windings, 9 and 10 and the track rail 11,- when .operat-' ing by alternating current,-and-so l thatahe motors-may be connected all in series for. low speeds and in series-parallel relation-for high speeds, between the third-rail 16 and -f the track rail 11, when operating by direct current I i The change-over switch 65 is adapted tobe operated, or controlled in its -operat 1on,--. by means of electro-rnagnets 67 and 67 ,-it being understood that the magnets may serve-t0 operate the hangeigver switch directly or to 105 control other means, such as electro-pnew 1 matic devices, for operating the switch. Interlocking switches 68 and 69, that are operated, respectively, by reversing switches 34 and 36, serve to prevent energizing of the magnet windings 67 and 67 when the switches are closed, the one or the otherof the switches being closed according as the motors operate in the. forward or in thereverse direction. Terminals of, each of the magnet windings 67 and 67 are connected, respectively, to contact fingers 70 and 71 of interlocking switches 72 and 73 that are car-- windings 67 and 67 ,pneumatically and the magnet win ried by the change-over switch and that serve to interrupt the circuits of the magnet after the-change-over switch has been 0 erated to the one position or the other. T e remaining contact terminals 7 4 and of the interlocking switches are connected, respectively, to upper and lower contact terminals76 and 77 a relay switch 78, controlling magnet winding 79 of which is connected between the current collector l5 and the track rail 11. The relay switch 78 normally occupies the osition shown and thus permits of the esta lishing of a.circuit from a battery 80 through the magnet winding .67, by means of a manuallyoperated switch 81, the magnet winding 67 serving to cause the change-over switch to be moved to the position indicated by the broken lines A-C, that is, so as to arrangethe circuits of the system foroperation of the motors by alternating current. It will thus be understood that the switch 78 prevents moving of the change-over switch 65 for the purpose of arranging the circuits of the system for operation by direct current when a ternating current is supplied to the system, and vice. versa, its function being to insure arrangement of the circuits by the changeover. switch of the system in accordance with the character of energy that is supplied thereto. If the change-over switch 65 1S 0 erated lugs 67 and 67 serve to control the pneumatic operating devices, the switch 81 may be employed to govern the supply of fluid-pressure to the operating devices for the change-over switch so that, unlessfluid-pressure is supplied to. the devices, operation of the changeover switch is impossible, such an arrange battery 80 and in circuit with which arcin- ,terposedrelay switches 83 and 84, the controlling magnet winding 85 for the former of whichds connected between the current col- ,lector 15 and the track rail 11, and the con trolling magnet winding 86 for the latter of which is connected between the trolley 12 and the track rail 11. The circuits through inclusive,

the switches 83 and 84 are so arranged that when both switches occupy their lowermost positions, as shown, or when both occupy their uppermost positions, as may be caused when the trolley 12 engages the trolley conductor 13 and the shoe 15 engages the thirdrail 16, the circuits of the magnets 42 to 63, will be interrupted. A circuit can be established only when one of the current collectors 12 and 15 engages the corresponding distributing conduQ or; that is, when the switches 83 and 84 occupy non-correspondmg positions I r The switches 83 and 84 are provided for the purpose of interrupting the'circuits of the magnet windings 42 to 63, inclusive, and thereby causing the motor circuits to be in -terrupted when the current collector which is in use-becomes disengaged from the corresponding distributing conductor, as 'may occur accidentally or in the third-rail at crossings. In order to prevent restablish ing of the motor circuits in their original condition, except by reestablishing starting conditions, movement of the switches 83 and 84 to their uppermost positions isprevented until the master switch 66 is returned to its initial position, bymeans of detents that are adapt-- ed to be released by meansof magnetwiridings 87 and 88, the circuits of which are established only when the master switch 66 occupies its initial position. V r

Switches 89 and 90, thatjare adapted to be opened when the current traversing t l1e re spective' pairs of motors and the controlling magnet windings 91 and 92 therefor exceeds a predetermined amount, are also interposed in'the' circuit of the common terminal conductor 82 for the magnet windings 42 to 63, inclusive, so that when an overload occurs upon either or bothpairs of motors, the switches 20 and 41, inclusive, will open. I

The specific means which I have shown and just described for preventing reestablishing of the motor circuits except by reestablishing starting conditions when the circuits of the windings 42 to 63, inclusive, are interrupted by one or more of the switches 83, 84, 89 and 90, are intended to be illustrative only of suitable means for the purpose'and such as may be conveniently applied to the comparatively simple system in connection with which I have found it convenient to illustrate and describe my invention. As here shown, acceleration of the motors may be effected manually by means of the master switch 66, but systems are well known in the art in which acceleration of the motors may be caused to occur automatically until predetermined conditions of operation are at tained, in 'whichsystems theindividually operated switches in the motor circuits are suitably interlockedand the circuits are so arranged that the switches must of necessity operate in a predetermined order that is pe- 9 6111155 to tlie system, and it of course, be

readily understood that the present invention is equally applicable to such systems and in many cases is preferably employed in such relations. When so applied, the reestablishing of the motor circuits will usually occur automatically without returning the master switch to its initial position, but since the application of the invention to such systems would unnecessarily complicate the circuits and cause confusion, I have deemed it most expedient to illustrate means which necessitate returning of the master controller to its initial position whenever the motor circuits are interrupted, as indicative, broadly, of means for preventing reestablishing of the motor circuits after interruption except by restablishing starting conditions.

In order to explain the operation of the system, letit be supposed first that the change-over switch occupies the position shown and that the trolley 12 engages the conductor 13. Upon closing the switch 81,

a circuit is established between the battery terminals by way of the devices that are indicated-by reference characters 78, 73, 67, 68 and 69, the switch 78 occupying its lowermost position. Energizing 9f the magnet winding 67 causes operation of the changeover switch to the position indicated by the line AC when the interlockin .switch 73 interrupts the circuit thereof. 1 the master switch 66 is then moved to the pe s tioniindicatedby the broken line a, a circuit-will be: established between the battery terminals.

by way of devices 95, 94, 93, 87 and 88, release of the detents for the switches 83, 84, 89 and 90 being thereby effected. As the trolley 12 engages the conductor 13, the magnet winding 86 will be energized and the switch 84 will be moved to its uppermost osition, whereupon two circuits are estabished between the battery terminals, one by way of'the devices indicated by reference characters 95, 96, 97, 98, 43, 83, 84, 90 and 89, switch 83 being in its lowermost position and switch 84 being in its up ermost osition. The other circuit that is established is by way of devices 95, 99, 100, 101, 53, 55, 83, 84, 90 and 89. Energizing of the magnet windings 42, 53 and 55 causes the switches 21, 31 and 33 to close.

In the ordiuary'o eration of the system, the direction-controiling switch 64 will be moved to the one or the other of the positions indicated by the broken lines f and 1', before operation of the master switch 65, so that,

u on operation of the latter, the circuits of t e magnet windings of certain of the reversing switches will be closed. If it beassumed that the switch 64 is moved to the position indicated by the broken line f, a circuit will i be established from the battery, through the devices 95, 102, 103, i04,60, 63', 56, 59, 83,

8.4, 90 and 89, and switches 34, 37, 38 and 41v will then close. If the switch 64 is moved to the position r, magnet windings 57, 58,61 and 62 will be ener ized and swltches 35, 36, 39 and40 will be c osed, the direction of the current flow through the field-magnet windings of the motors being reversed. Upon operation of the one or the other of the switches 34 and 36, the corresponding interlocking switches 68 and 69 will be opened and the circuits of the magnet windin s 67 and 67 of the change-over switch wil be interrupted so as to prevent operation of that switch while the motor circuits are established.

When the control or auxiliary circuits are established, as has been indicated, by moving the master switch 66 to the osition a and the switch 64 to the position the pairs of motors will be connected betweensuitable low-voltage oints in the respective trans 85 'former windings and the ground, the circuit -through one pair'of motors traversing switch 31, a portion of the resistance 18, motor armatures 1 and 2, switch 34, motor field magnet windings 5 and 6, switch 37, magnet Winding 91 and switch 21;' and the other motor circuit traversing switch 33, a portion of the resistance 19, switch 60, motor field magnet windings 7 and 8, switch 41, motor armatures 3 and 4 and overload relay magnet winding 92. Upon movement of the master switch to the position b, the magnet windin s 49 and 51 will be energized and switches- 9" and 29 will close, the portions of the resistances 18 and 19 that were included in the motor circuits'being thereby shunted. Movement of the'master switch to the position c establishes a circuit through devices 95, 105, 106, 107, 52 54, 83, 84, 90 and 89, and the switches 30 and 32 consequently close. Movement of the master swltch to the position cl; interrupts the circuit through the magnet windings 53 and 55 and permlts switches 31 and 33 to open. One of the motor circuits is then established from a higher voltage point in the transformer winding 9 than was previously utilized, by way of the switch 30, the other half of the resistance 18 and throu h the motors, aswas before described, and the other motor circuit is established in a corresponding manner. Movement of the master switch to the position e establishes circuits of the magnet windings 48 and 50 and the switches 26 and 28 close, thereby shunting resistances 18 and 19. Themotors are now supplied with full voltage for operation by alternating current and further movement of the master switch 66 is inefiective While the change-over switch occupies the position indicated by the broken lines A'C. 1

If it is desired to operate b direct current, the trolley 12 is disengaged from the conductor 13 and the contact shoe'15 is caused to engage the third-rail 16, whereupon the switch 78 is moved to its uppermost position. If the change-over. switch 65 occupies the position indicated .by broken lines AC, a circuit may be established by the switch 81 through interlocking switch 72, magnet winding 67 a and interlocking switches 68 and 69. When the change-over switch is moved to the position shown in full lines, the circuit of the magnet winding 67 a is interru 'ted by the interlocking switch 72. When 1; e Inaster switch occupies position a, magnet windsing 87 is energized and causes the corresponding detent to permit operation of the switch 83 to its uppermost position. Then if .the switch 64 occupies the position f, the reversing switches 34, 37, 38 and 41 will be closed, as before described closing of the switch 34 causing opening of the interlocking switch 68 which thereby causes interruption of the circuits of the magnet windings 67 and 67 a so as to prevent, operation of the change-over switch while the motor circuits are established. While the master switch occupies position a, two circuits are established, one by way of the devices 95, 96, 97, 108, 42, 83,

i 84, 90 and 89 and the other traversing devices 95, 109, 110, 1 11, 45, s3, s4, 90 and 89.

Switches 20, 23, 34, 37, 38 and 41 are then closed, and the motor circuits are established by way of devices 15, 20, 91,37, 6, 5, 34, 2, 1, 18, 23, 19, 60, 7, s, 4.1, 3, 4 and 92,

the motors thus being connected all in serieswith the resistances 18 and' -19-dn circuit,

Movement of the master switch rto'thepdsition '1) establishes the circuits of magnet windings 49 and 51 and the switches 27 and 29 close, thereby shunting portions of the resistances 18 and 19. Movement of the master switch to the positions 0 and'd establishes no new circuits, but upon movement to the position 6, magnet wind s 48 apd 50 become energized and the 'sw1tches'26 and 28 short-circuit the resistances 18 and 19, leaving the motors connected in series without resistance in the circuit. When the master switch is. moved to the pjasition f, a circuit is established by way of devices 95, 112, 113,

1 14, 47, 83, 84, 90 and 89, the switch 25 being the switch 23 opens, and the motors are still' left connected in full series relation without resistance in circuit. ter switch to position 9 establishes a circuit by way ofthe devices 95, 115, 116, 117, 44, 46, 83, 84,90 and 89, the switches 22 and 24 .being thereby closed; the circuit of magnet windin 47' is interrupted and switch 25 opens, Ie'aving the motors connected in series-parallel relation with the resistances 18 and 19 included in circuit. In the succeeding positions It and i of the master switch, the resistances 18 and 19 are removed from the circuit by means of switches 26, 27, 28 and 29, in a manner which hasb een heretofore Movement of the masmay be operated as are required to pro erly' establish the motorcircuits in accor ance with the character of the energy supplied to the system. As has been before stated, all or any of the devices which are here shown as electrically operated may be operated by any other suitable means, such as pneumatic devices, the operations of which are controlled by' means of the respective magnet windings. The arrangements of the circuits and the structural details of the devices may obviously be varied within Wide limits without altering the mode of operation of the invention or departing from its spirit and scope.

I claim as my invention:

'1. In a system of control, the combination with sources of direct .and alternating current, translating devices and means for arranging1 the circuits of the system for operation t ereof by the one character of energy or the other, of a switch that permits operation of the said means-to arrange the circuits of the system for direct current operatfcn-r y when the system is supplied with direw current.

2. In a system of control, the combination with sources of direct and alternating current, and translating devices, of a changeover switch for arranging the circuits of the system for operation of the devices by the one character of energy or the other, and a switch that permits operation of the changeover switch to arrange the circuits for direct current operation only when the system is supplied with direct current.

3. In a s stem of control, the combination with distri uting conductors that are supplied, respectively, with direct and alternating. current, current collectors to engage the respective conductors, and translating devices, of means for arranging the circuits of the system for operation of the devices by the one character of energy or the other and a switch thatprevents the said means from operating to'arrangethe circuits for direct current operation except when the collector for direct current engages the corresponding conductor.

4'. In a system of control, the combination with sources of direct and alternating cur- 'rent, and translating devices, of a changeover switch for arranging the circuits of the system for operation of the devices by the one character'of energy or the other, con trolling magnet wiiidings therefor, and a circuit governing switch that prevents the c ange-over switch from aperatingjto arrange the circuits for operatlon by direct current except when direct current is supplied to the system.

5. In a system of control, the combination with distributing conductors that are supwhen the collector for direct current engages the corresponding distributing conductor.

6. In a system of control, the combination with distributing conductors that are supplied, respectively, with direct and alternating current, current collectors to engage the respective conductors, and translating devices, of a change-over switch for arranging the circuits of the system for o eration of the devices by the one character 0 energy or the other, controlling magnet windings therefor, and a circuit-governing switch that prevents energizing of one of the magnet windings except when the collector for direct current engages the corresponding conductor.

-7. In a system of control, the combination with motors that may be operated by either direct or alternating current, and a changeover switch for arranging the circuits of the system for operation thereof by the one character of'energy or the other, of switches for governing the direction of rotation of the motors and means for preventing o eration of the change-over switch except w en-the said direction-governing switches .are open.

8. In a system of control, the combination with motors that may be operated by either alternating or'direct current, and means for arran ing the circuits of the system for operation iy the one character of energy or the other, of means for governing the direction of rotation of the motor and means for preventing the further arrangement-of the circuits of the system for operation except when the direction-governin means are inoperative.

9. In a system 0 control, the combination with motors that may be operated by either direct or alternating current, a change-over switch for arranging the circuits-of the system for operation by the one character of energy or the other, and controlling magnet windings therefor, of means for governin the direction of rotation of the motors, an means operated thereby for preventing energizing of the controlling magnet windings except when the direction-governing means are ino erative.

10. n a system of control, the combination with motors that may be operated by either direct or alternating current, a cha eover switch for arranging the circuits of t e system for operation by the one character of energy or the other, and controlling magnet windings therefor, of a switch for gover the direction of rotation of the motorfsiiid means operated thereby for preventin energizing of the controlling magnet windings except when the switches are open.

11. In a system of control, the combination with distributing conductors that are supplied, respectively, with direct and alternating currents, and current collectors to engage the respective conductors, of translating devices, switches for governing the circuits thereof, and means for preventing closing of the said switches except when the one or the other of the current collectors engages the corresponding distributing'conductor.

12. In asystem of control, the combination with distributing conductors that are supplied, respectively, with direct and alternating current, and current collectors to engage the respective conductors, of translat ing devices, means for governing the circuits thereof, and means for preventing operation of the said means except when the one or the other of the current collectors engages the corresponding distributing conductor.

13. In a system of control, the combination with distributing conductors that are supplied, respectively, with direct and alternating current, and current collectors to engage the respective conductors, oftranslating devices, switches for governing the circuits thereof, controlling magnet windings therefor, and means for interrupting the circuits thereof except when the one or the other of the current collectors engages the corresponding conductor.

14. In a system of control, the combination with distributing conductors that are supplied, respectively, with direct and alternating current, and current collectors to engage the' respective conductors, of translating devices, switches for governing the circuits thereof, controlling magnet windings therefor, and means for interrupting the circuits thereof except when the one or the other of the current collectors engages the corre' sponding conductor.

15. In a system of control, the combination with distributing conductors that are supplied, respectively, with direct and alternating current, and current collectors .to engage respectively therewith, of translating devices, switches for governing the circuits thereof, controlling magnet windings therefor, switches that are interposed in 'the circuits thereof and controlling magnet windings that are included in circuit with the respective current collectors.

16. In a system of control, the combination with sources of direct and alternating current, translatin devices and means for In testimony whereof, I have hereunto arranging circuits 0 the system for operation subscribed my name this 28th 'day of Februthereof by the one character of energy or the ary, 1906.

other, of a switch that permits operation of 5 the said means to arrange the circuits of the system only in accordance with the character of the energy supplied to the system.

HOWARD L. BEACH. Witnesses THOS. S. HOWELL,

BIRNEY HINES. 

